'Fringe': Joshua Jackson back on set! So where is Peter?

Good news,
"Fringe" fans. After months of wondering how long we'd have to wait to see
Joshua Jackson back on our screens, there has officially been a
Pacey
Peter sighting on set.

According to an
autograph seeker waiting outside the location shoot, fans were initially told that Jackson had just stopped by to celebrate a crew member's birthday. Later, Jackson confirmed that he was shooting scenes today.

That means Peter will be back by Episode 4, for those of you keeping track. There is a possibility that his first episode back will actually be Episode 3.

If the new preview is any indication, the lack of Peter in Walter's and Olivia's lives has been felt, even if they don't quite know what they're missing. "We all get really good at pretending that the loneliness isn't there, and then something comes along to remind us," Olivia says. "I know what it's like to have a hole in my life. It's been there as long as I can remember."